Metal-bending machine.



PATENTED FEB. 26, 1907.

W. FBHR.' METAL 'BENDING MACHINE.

APPLICATION FILED NOV..21, 1906.

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UNITED STATES PATENT rrion METAL-BENDING MACHINE.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Original application filed December 22, 1905, Serial No. 292,946. Divided and this application filed November 21,1906. Serial To all whom it may concern:

Be it known that I, WVILLIAM FEHR, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Metal-Bending Machines, of which the fol lowing is a specification.

My invention has relation to a metal-bending machine; and in such connection it relates particularly to the construction and arrangement of such a machine and being a division of an application filed by me under date of December 22, 1905, Serial No. 292,946.

The principal objects of my invention are, first, to provide a bending-machine with means for bending the slotted portion of a metal strip designed to become a heddle outward and in opposite directions to each other; second, to provide such a machine with movable dies adapted to permit of the automatic adjustment of the same to a position corresponding to the position of the slotted portion in the strip; third, to pro-' vide one of the dies with projecting means which by passing through the slot of the metal strip and into a slot of the other die to permit the strip to automatically shift both dies into a position in alinement with the slot in the strip when the same differs in its position with the position occupied by the dies; fourth, to arrange the means projecting from one of the dies movably therein so as to permit of the shifting of the same backinto the die by the metal strip when an unslotted portion of the same is shifted below the dies, and, fifth, to provide the dies with -means to automatically return the same to their normal operative position.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings, forming part hereof, in which Figures 1 and 2 are views illustrating, respectively, in front and side elevations a machine having dies for bending certain portions of a metal strip in opposite directions, means projecting from one of the dies for permitting of the shif ting of both dies by the strip to be bent, and means for automatically returning the dies to their normal position, all embodying features of my invention. Figs. 3 and 4 are detail views, enlarged, illussides, as shown in Fig. 6.

trating, respectively, in longitudinal and in cross-section the formingdies and their holders. Fig. 5 is an enlarged horizontal. sectional view of the upper forming-die and its holder. Fig. 6 is an enlarged top or plan view of the lower forming-die and its holder. Figs. 7 and 8 are detail yiews, enlarged, illustrating, respectively, in side elevation and in vertical section the upper forming-die. Figs. 9, 10, and 11 are similar views illustrating, respectively, in side elevation, top or plan view, and in vertical section the lower forming-die. Figs. 12 and 13 are views illustrating, re-

spectively, in top or plan view and inside elevation a portion of the metal strip prior to and after the bending of the same to complete the formation of an eye therein.

Referring to the drawings, is is a standard, having an opening 7c, in which are arranged superposed dies k and 7c. The lower die k proper is provided with a slot 7C and with a depression k and a projection is at its upper.

face, as shown in Figs. 9, 10, and 11. The upper die k proper consists of aU-shaped frame it, having movably arranged therein a tapering blade 76 which by the intervention of a spring is, engaging the base 7c and. surrounding a stem [r thereof, is normally held in a position in which the same projects a certain distance beyond the die 7c. At its lower face and at the respective sides of the blade k the upper die k is provided with a depression lc and'a projection is, sim lar in outline to the depression and projection of the lower die lc but reversed in their arrangement, so as to permit of the engagement of the projection of one die in the depression of the other die, as will be readily understood in conjunction with Figs. 7 to 11, inclusive. The lower die 10 is secured to a block is, which is slidably arranged in a holder 7c and is held in proper position therein by springs is, engaging the block 7e from opposite The holder 1c is provided with arms is", adjustably supporting guide-screws 7c between which a metal strip 1), designed to become a heddle, passes and which serves to hold the same in proper position between the dies 76 and it as shown in Fig. 3. The U-shaped upper die 763, by means of a set-screw 7c, is secured to a block 7C slidably supported in a holder k by plates 7c, and is held in proper posi, tion by a spring, k secured to the holder 7c, as shown in Fig. 5'. The holder 7:: for the lower die 70 by means of a bolt Z and pro- I and le If, on the other hand, the metal jections k engaging the same from opposite sides, is adjustably secured to the standard 7c. At its lower end the die-holder lc rests upon a threaded bolt Z, arranged in a boss 1925 of the standard 7c, which serves to adjust the lower die k in a vertical plane in the standard 7c. The holder k for the upper die 7C3, by means of a bolt Z and ribs Z is secured to a slide Z arranged in the standard 7c, and by the intervention of a bolt Z of a boss Z can be adjusted in a vertical plane on the slide 1*. A block 1, pivotally secured .to a bolt Z of the slide Z, is engaged by a leverl pivotally secured in the point Z to the standard 7c, which by means of an arm Z, surrounding with its free end a roller on the driving-shaft a, is connected with a cam a thereof.

of a roller Z secured to the arm Z will actuate the same and lever l to depress the slide Z in the standard 7c, and thus bring the upper die 763 into engagement with thelower die k During the downward movement of the upper die k the blade 76 is first brought into engagement with the lower die 75 by entering the slot k thereof, after which the projections Ir and 70 will be brought into engagement with the shanks and b formed by a slot b ,punched in the metal strip 1), and will force the same into the depressions 7C5 and 7c" of the dies. The shanks b and 71 of the-metal strip occupying the position shown in Fig. 12 will be bent in opposite directions,

as shown in Fig. 13, thus forming an eye 5 in the metal strip, which when serving as a heddle will be of a shape required to support a thread. (Not shown.) In case the eye b in the metal strip 6 does not occupy the proper position with respect to the dies 762 and k the same will automatically be brought into a position in alinement with the eye b in the strip b in the following manner: The blade of the upper die k will with its pointed end first be-brought into engagement with the slot 12 of the strip 1), and by descending into the same one of its inclined sides will contact with one or the other of the end portions 6 and be shifted sidewise by the strip 6. This movement imparted to the blade 76 is transmitted by the same to the upper die k and to the lower die lc by descending into the slot Ir thereof. The dies 762 and k are thus moved sidewise in the holders 7c and 70 against the tension of their respective springs 7c and 70 and are held in this position until the shanks I) and b of the metal strip are bent in the form shown in Fig. 13. As soon as the upper die 70 is raised and its blades k disengaged from the lower die A and the metal strip 1) the springs 7c and 15 return the same to their normal position in the respective holders 7c metal strip 1) will be moved backward into an inoperative position in the die 15 against the tension of the spring 7r, bearing with its up per end against the block is and will thus be prevented from being broken during the downward movement of the die it. c

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Patent, is 1. In a machine of the character described, dies, each of said dies having a projection and a depression, said dies when moved one against the other adapted to bend in opposite directions separated portions'of a metal At each revolution of the drivingshaft a j the throw portion a of the cam a by means strip placed between the same, and means carried by one of said dies adapted to engage the other of said dies prior to the bending of the metal strip by the depressions and projections thereof.

2. In a machine of the character described, dies, each of said dies having a projection and a depression, said dies when moved one against the other adapted to bend in opposite directions separated portions of a metal strip vplaced betweenv the same, and means carried by one of said dies adapted to engage the other of said dies prior to the bending of the metal strip by the depressions and projections thereof, by first passing through a slot arranged in the strip.

8. In a machine of the character described, dies, each of said dies having a projection and a depression reversed in position with respect to each other, means carried by'the upper one of said dies, said means adapted when said die is moved toward the lower one of the dies to engage a metal strip passing between the same and to be shifted into an inoperative position in the upper die, when abutting against an unslotted portion of the strip. 4. In a machine of the character described, holders, dies slidably arranged therein having means adapted to bend separated portions of a metal strip in opposite directions to form an eye thereln, means extendlng from the upper one of said dies adapted to enter a slot arranged in the. lower one of said dies, said extending means arranged when entering a slot of the metal strip to shift and ITS form eyes in a metal strip by bending separated portions thereof, in opposite directions to each other, a blade movably arranged in and extending from the upper one of said dies, means for returning said blade to an op erative position in its die, when removed therefrom, said blade adapted to enter a slot arranged in the lower one of said dies and a slot in the metal strip placed between the dies so as to be shifted by the strip to move the upper and lower die into alinement with each other and with the slot of the strip, when the said slot occupies a position sidewise to the central axis of said dies.

6. In a machine of the character described,

holders, dies slidably arranged therein hav-- ing projections and depressions adapted to form eyes in a metal strip placed between the same by bending separated portions thereof in opposite directions to each other, a blade mova bly arranged in and extending from the upper one of said dies, means for returning said blade in an operative position in its die, when removed therefrom, said blade adapted to enter a slot arranged in the lower one of said dies and to pass through a slot in the metal strip so as to be shifted by the strip to move the upper and lower dies into alinement with each other and with the slot of the strip when the said slot occupies a position sidewise to the central axis of 'said dies and to shift said blade into an inoperative position, when an unslotted portion of the strip @011- tacts with the same.

In witness whereof I have hereunto aflixed my signature in the presence of the two subscribing Witnesses.

WVILLIAM FEHR.

Witnesses:

J. WALTER DOUGLASS, G120. W. REED. 

